Method _getViewportScrollPosition

src/cdk/drag-drop/drag-ref.ts:1548–1553

Gets the scroll position of the viewport.

()

  /** Gets the scroll position of the viewport. */
  private _getViewportScrollPosition() {
    return (
      this._parentPositions.positions.get(this._document)?.scrollPosition ||
      this._parentPositions.getViewportScrollPosition()
    );
  }

  /**
   * Lazily resolves and returns the shadow root of the element. We do this in a function, rather